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          立创EDA原理图及PCB绘制流程
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        <p>   参考原文：<a target="_blank" rel="noopener" href="https://blog.csdn.net/qq_47134270/article/details/128424919">https://blog.csdn.net/qq_47134270/article/details/128424919</a></p>
<h3 id="原理图绘制"><a href="#原理图绘制" class="headerlink" title="原理图绘制"></a>原理图绘制</h3><p><strong>非连接标志</strong></p>
<p>​    非连接标志用于原理图上元器件不使用或需要悬空的引脚，避免出现引脚没有进行网络连接而在设计管理器内报错。</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310152120809.png" style="zoom:80%;">

<p>这个要直接放置在元器件的引脚上。</p>
<p><strong>网络标签</strong></p>
<p>​        假如某两个需要连接的管脚距离比较远，不适合用导线连接。可以用标签，如下（网络标签的名字随便写，连接的两者要保证一样）</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310152127195.png" style="zoom:67%;">

<p>​        原理图绘制完之后，点击“设计”，“检查DRC”:</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310292151381.png" style="zoom:70%;">

<p>​        然后再点击“设计”，“更新/转换原理图到PCB”, 就生成了相应的pcb文件。</p>
<h3 id="PCB绘制"><a href="#PCB绘制" class="headerlink" title="PCB绘制"></a>PCB绘制</h3><h4 id="（1）放置板框"><a href="#（1）放置板框" class="headerlink" title="（1）放置板框"></a>（1）放置板框</h4><p>在图层选项卡中选择“其他”，“板框层”，被选中的这个层前面就多了一个笔的记号：</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310292217127.png" style="zoom:67%;">

<p>选择“放置”，“板框”，“矩形”来设置板框：</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310302100180.png" style="zoom:60%;">

<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310302109641.png" style="zoom:67%;">

<h4 id="（2）绘制定位孔"><a href="#（2）绘制定位孔" class="headerlink" title="（2）绘制定位孔"></a>（2）绘制定位孔</h4><p>​        定位孔作用：PCB电路板在组装成品时要做螺丝固定孔使用。定位孔可以使用矩形、圆形或者多边形。</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310302227407.png" style="zoom:67%;">

<p>定位孔是在多层这一层(待板子出来后确认一下)。</p>
<h4 id="（3）布局"><a href="#（3）布局" class="headerlink" title="（3）布局"></a>（3）布局</h4><p>​        确定好定位孔后，再来确定元件的布局 ，元件布局一般遵循以下规则：</p>
<p>1、为了方便自动焊接，每一边都要留出 3.5 mm 的传送边。要是不够的话，就可以考虑加工艺传送边。</p>
<p>2、一般的情况下，元器件常常会布置在pcb板的顶层上。如果顶层元件过于密集，我们可以考虑把部分高度有限、而且发热量较小的器件放到底层（如贴片电阻、电容等）</p>
<p>3、一般将模块放到同一片区域进行布局，减少后面布线的复杂性，譬如：选中晶振电路，使用设计中的布局传递，它会自动在PCB中选中模块的所有零件，我们再对它进行布局即可。</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310302233993.png" style="zoom:50%;">

<p>在图层选项卡中选择<strong>顶层</strong>，然后开始放置元器件，中途也可以把器件修改到<strong>底层</strong>。</p>
<h4 id="4-布线"><a href="#4-布线" class="headerlink" title="(4) 布线"></a>(4) 布线</h4><p>​        立创EDA支持自动布线，点击布线中的自动布线即可。 当然，也可以自行布线，在顶部菜单栏点击如下图标。</p>
<p><img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310302312938.png"></p>
<p>​        当你选中一条导线时，可以在右边属性面板修改它对应的属性。</p>
<p>​        在布线过程中使用 快捷键 “+”，“ - ” 可以很方便地调节当前的走线的大小。按 TAB键 修改线宽参数。</p>
<p>​        布线时，如果你想布一段线段后，下一段线增大线宽，可以按 “SHIFT+W” 快速切换导线宽度。</p>
<p>​        当你绘制一个双层板或多层板时你可以放置过孔，使顶层和底层导通。</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310310837362.png" style="zoom:50%;">

<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310310838157.png" style="zoom:70%;">

<h4 id="（5）添加丝印"><a href="#（5）添加丝印" class="headerlink" title="（5）添加丝印"></a>（5）添加丝印</h4><p>​        先切换到顶层丝印层，使用顶部菜单栏的文本即可添加丝印</p>
<p><img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310312155286.png"></p>
<h4 id="（6）添加泪滴"><a href="#（6）添加泪滴" class="headerlink" title="（6）添加泪滴"></a>（6）添加泪滴</h4><p>​        泪滴的作用是放置导线断裂，起到保护作用。</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310312207724.png" style="zoom:50%;">

<h4 id="（7）铺铜"><a href="#（7）铺铜" class="headerlink" title="（7）铺铜"></a>（7）铺铜</h4><p>​        铺铜可以减小地线阻抗，提高抗干扰能力；降低压降，提高电源效率；与地线相连，还可以减小环路面积。在<strong>顶层和底层分别点击</strong>顶部菜单栏的铺铜符号，选中整块PCB，出现以下弹窗。网络一般选择GND，铺地铜，其他参数默认即可。</p>
<p><img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310312213658.png"></p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310312214410.png" style="zoom:67%;">

<h4 id="（8）DRC检查"><a href="#（8）DRC检查" class="headerlink" title="（8）DRC检查"></a>（8）DRC检查</h4><p>​        和原理图一样，PCB也需要进行DRC检查，检查未出现错误后说明板子已经画好啦！</p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310312216293.png" style="zoom:67%;">

<h4 id="9-显示3D效果"><a href="#9-显示3D效果" class="headerlink" title="(9) 显示3D效果"></a>(9) 显示3D效果</h4><p><img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310312220099.png"></p>
<img src="https://xdl-blog-picture.oss-cn-shanghai.aliyuncs.com/img/202310312227122.png" style="zoom:50%;">

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